Abstract We present our study of conjugated polymer-small molecule (SM)-non-fullerene ternary organic solar cells (OSCs), which employs conjugated polymer PTB7-Th and small molecule p-DTS(FBTTh2)2 as donors and non-fullerene molecule IEICO-4F as an acceptor. It is observed that the power conversion efficiency (PCE) of ∼10.9% for PTB7-Th: p-DTS(FBTTh2)2: IEICO-4F ternary OSCs with 15 wt% of p-DTS(FBTTh2)2 SM is higher than PCE of ∼9.8% for PTB7-Th: IEICO-4F OSCs. Morphological studies confirm that the addition of p-DTS(FBTTh2)2 SM in PTB7-Th: IEICO-4F binary blend improves molecular ordering and crystallinity of PTB7-Th due to the favorable interaction with p-DTS(FBTTh2)2 thereby providing 3-D textured structures consisting of a mixture of edge-on and face-on orientations. The improved molecular ordering is shown to enhance exciton generation rate, exciton dissociation, charge collection, and to reduce charge recombination, all of which boosts the PCE.

中文翻译：

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通过调节复合动力学和分子排序增强共轭聚合物-小分子-非富勒烯三元有机太阳能电池的性能

摘要 我们介绍了我们对共轭聚合物-小分子 (SM)-非富勒烯三元有机太阳能电池 (OSC) 的研究，该电池采用共轭聚合物 PTB7-Th 和小分子 p-DTS(FBTTh2)2 作为供体和非富勒烯分子IEICO-4F 作为接受者。据观察，对于 PTB7-Th：p-DTS(FBTTh2)2：具有 15wt% p-DTS(FBTTh2)2 SM 的 IEICO-4F 三元 OSC，其功率转换效率 (PCE) 约为 10.9%，高于 PCE PTB7-Th：IEICO-4F OSCs 约为 9.8%。形态学研究证实，在 PTB7-Th: IEICO-4F 二元混合物中添加 p-DTS(FBTTh2)2 SM 改善了 PTB7-Th 的分子排序和结晶度，这是由于与 p-DTS(FBTTh2)2 的有利相互作用，从而提供了 3 -D 纹理结构由边缘和正面方向的混合组成。改进的分子排序被证明可以提高激子产生率，